NASA’s long-term goals changed on Dec. 11, 2017, shifting from human exploration of asteroids to a return to the Moon.
The 2010 version of the National Space Policy contained these instructions: "Set far-reaching exploration milestones. By 2025, begin crewed missions beyond the moon, including sending humans to an asteroid. By the mid-2030s, send humans to orbit Mars and return them safely to Earth …."
In his Space Policy Directive 1, President Donald Trump removed that section and replaced it